“Dating Game” serial killer Rodney Alcala pleaded not guilty today to charges that he murdered a pair of 23-year-old Manhattan beauties in the 1970s.

The scraggly-haired Alcala, wearing orange jumpsuit and shackled by his wrists and ankles, uttered “not guilty” to murder in the first degree and murder in the second degree.

His next date in court was set for Oct. 30.

“Remand the defendant, please,” Manhattan Supreme Court Justice Bonnie Wittner said as Alcala was led out of court.

The creepy photographer Alcala was convicted in 2010 of strangling four women and a 12-year-old girl in Southern California in the 1970s. Alcala is on Death Row for those California slayings.

Now he’s facing the music in Manhattan, where he’s accused of killing Cornelia Crilleyand Ellen Hover.

“After more than three decades, the defendant will finally face the justice system in New York for the murder of two victims,” said Manhattan DA Cyrus Vance said today.

“My Office’s Forensic Sciences/Cold Case Unit was created because all crime victims and their families deserve closure, no matter how long ago the crime occurred. Today’s arraignment brings us a step closer to obtaining justice for Ms. Crilley and Ms. Hover.”

Crilley was a TWA flight attendant, who was raped inside her Upper East Side apartment in 1971. She was strangled with her own panty hose, law enforcement sources said.

Crilley had just moved into that apartment within a day of her death. It’s believed Crilley met Alcala on the street as she was lugged boxes upstairs, sources said.